Wristwatch



FIG. 1 is a top plan view of a wristwatch showing my new design; the bottom being substantially flat, plain and unornamented;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof; and,

FIG. 4 is a top and right front perspective view thereof. 

The ornamental design for a wristwatch, as shown and described. 